Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede4f970dd2cd32f…

MALICIOUS

PDF

78.8 KB Created: 2021-09-07 11:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d59d6b850bd67cdb10fd2b8aa17e6a08 SHA-1: 5be3aed9d1ea476bcfe9756b6f82d7b2fe999707 SHA-256: ede4f970dd2cd32f0e6ff2f73efa9408db833484c8c34ccbb73a28703823e738
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=iberital+intenz+manual PDF link annotation
    • https://actaviaserica.org/board/file/files/bemometurariliduwekukelo.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/2070947980.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608199f00a9b7---zafakuxofifaxal.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/bupepazomozed.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/59725512518.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c86ba44e---fixadamirutopirisidi.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/64397539690.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/ohnip3r2lmuupsma04lkqq7hn4/28664122189.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/7065530819.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/tunekanitiporuzofus.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/damamojigatakozigukojuzun.pdfIn PDF document text
    • http://njchemland.com/upload/files/11560819904.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/sewakipezajevataz.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/57396882254.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69abb75ac4---12543864467.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/46534751590.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/pudizonovidixilerisos.pdfIn PDF document text
    • http://diacritic.org/travel/app/webroot/img/files/nutitakofaxapomumum.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/fagefuzofeloniwiwapurubi.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/tanuziforagojijugif.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/guparisaxu.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/gominudonowijib.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/c9879687a62447d2b14666d0338fc202/luwikesomunulelunaxafuwe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD3 19196 bytes
SHA-256: ce14b006ecac253161737110521cc6fef79b03c68dc545a17ead7d748afe0200
font_01_sfnt_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 10232 bytes
SHA-256: 4393ffad597837a25cf927133d5c14317199f6f659a5de701f230c7d57a19b2e
font_02_sfnt_off000115b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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